Circuit arrangement for the temperature-dependent actuation of a switching element

Abstract

The invention relates to a circuit arrangement ( 100 ) for the temperature-dependent actuation of a first switching element (S 1 ), comprising an input terminal (EA) for accepting an input potential, an output terminal (AA) for transferring an output potential to a first control terminal (G 1 ) of the first switching element (S 1 ), and a temperature-dependent component (RT) which is connected between the input terminal (EA) and the output terminal (AA).

The invention claimed is: 
     
       1. A circuit arrangement for the temperature-dependent actuation of a first switching element, the current arrangement comprising:
 an input connection for receiving an input potential, an output connection for transferring an output potential to a first control connection of the first switching element, a temperature-dependent component, a second switching element, and a first resistor; 
 wherein the first resistor is connected in series with the temperature-dependent component between the input connection and the output connection, the second switching element between the input connection and the output connection, and the second control connection of the second switching element is connected to the center tap between the first resistor and the temperature-dependent component, and 
 the temperature-dependent component is connected between the input connection and the output connection. 
 
     
     
       2. The circuit arrangement as claimed in  claim 1 ,
 further comprising a second resistor, 
 wherein the second resistor is connected between the input connection and the output connection. 
 
     
     
       3. The circuit arrangement as claimed in  claim 1 ,
 further comprising a third resistor, 
 wherein the third resistor is connected between the input connection and the source contact of the second switching element. 
 
     
     
       4. The circuit arrangement as claimed in  claim 3 ,
 further comprising a first diode, 
 wherein the first diode is connected between the third resistor and the source contact of the second switching element and prevents a flow of current from the diode in the direction of the third resistor. 
 
     
     
       5. The circuit arrangement as claimed in  claim 3 ,
 further comprising a first diode, 
 wherein the first diode is connected between the third resistor and the source contact of the second switching element and prevents a flow of current from the third resistor in the direction of the second switching element. 
 
     
     
       6. A circuit module comprising a circuit arrangement for the temperature-dependent actuation of a first switching element as claimed in  claim 1  and comprising the first switching element connected to the output connection. 
     
     
       7. The circuit module as claimed in  claim 6 , further comprising a driver circuit connected to the input connection. 
     
     
       8. An inverter (WR), comprising a circuit module comprising:
 an input connection for receiving an input potential, an output connection for transferring an output potential to a first control connection of the first switching element, a temperature-dependent component, a second switching element, and a first resistor; 
 wherein the first resistor is connected in series with the temperature-dependent component between the input connection and the output connection, the second switching element is connected between the input connection and the output connection and the second control connection of the second switching element is connected to the center tap between the first resistor and the temperature-dependent component, and 
 the temperature-dependent component is connected between the input connection and the output connection, and 
 the first switching element is connected to the output connection. 
 
     
     
       9. An electric drivetrain, comprising:
 an input connection for receiving an input potential, an output connection for transferring an output potential to a first control connection of the first switching element, a temperature-dependent component, a second switching element, and a first resistor; 
 wherein the first resistor is connected in series with the temperature-dependent component between the input connection and the output connection, the second switching element is connected between the input connection and the output connection, and the second control connection of the second switching element is connected to the center tap between the first resistor and the temperature-dependent component, and 
 the temperature-dependent component is connected between the input connection and the output connection, and 
 the first switching element is connected to the output connection; and 
 an electric machine (EM).